WO2015064533A1 - Liquid crystal panel and liquid crystal display device - Google Patents

Liquid crystal panel and liquid crystal display device Download PDF

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Publication number
WO2015064533A1
WO2015064533A1 PCT/JP2014/078483 JP2014078483W WO2015064533A1 WO 2015064533 A1 WO2015064533 A1 WO 2015064533A1 JP 2014078483 W JP2014078483 W JP 2014078483W WO 2015064533 A1 WO2015064533 A1 WO 2015064533A1
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Prior art keywords
liquid crystal
crystal panel
substrate
color filter
array substrate
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PCT/JP2014/078483
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French (fr)
Japanese (ja)
Inventor
英彦 山口
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堺ディスプレイプロダクト株式会社
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Publication of WO2015064533A1 publication Critical patent/WO2015064533A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1341—Filling or closing of cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars

Definitions

  • the present invention relates to a liquid crystal panel in which a liquid crystal substance is sealed in a gap held by a spacer formed between opposing substrates, and a liquid crystal display device using the liquid crystal panel.
  • a liquid crystal panel included in a liquid crystal display device has two light-transmitting substrates that are made of thin glass plates and a liquid crystal substance sealed in a gap between the substrates.
  • One substrate is an array substrate that includes display elements arranged in a matrix and signal wirings arranged between the display elements to drive the display elements.
  • a display element includes a thin film transistor (TFT: Thin Film Transistor) and a pixel electrode.
  • TFT Thin Film Transistor
  • An alignment film for aligning the liquid crystal material is formed on the opposing surface of the array substrate.
  • the other substrate is a color filter substrate in which a colored layer (color filter) facing the display element and a light shielding layer (black matrix) between the colored layers are formed, and an alignment film is formed on the facing surface. Is formed.
  • a spacer is provided to maintain a gap between the array substrate and the color filter substrate.
  • the spacer is provided in contact with the alignment film.
  • Conventional liquid crystal panels include, for example, transparent spherical spacers that are irregularly distributed between substrates, or columnar so-called photo spacers that are provided so as to overlap a black matrix and not to overlap a color filter. (For example, refer to Patent Document 1).
  • the spacers are in contact with each other because the relative positional relationship between the array substrate and the color filter substrate changes. There was a risk of rubbing the alignment film. In that case, the alignment film positioned on the display element or the color filter is rubbed, thereby causing an alignment abnormality in which the liquid crystal substance cannot be aligned in a desired direction, which causes display defects such as light leakage.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to use a liquid crystal panel that reliably prevents display defects caused by spacers even when bending occurs, and the liquid crystal panel.
  • the liquid crystal display device is provided.
  • the liquid crystal panel according to the present invention is a liquid crystal panel in which a liquid crystal material is sealed in a gap held by a spacer formed between opposing substrates, wherein the spacer protrudes from each opposing surface of the opposing substrate. And at least a part of the top surface of one convex part is in contact with at least a part of the top surface of the other convex part.
  • the spacer includes a convex portion protruding from each facing surface of the opposing substrate. At least a part of the top surface of one convex part is in contact with at least a part of the top surface of the other convex part. Therefore, even when the liquid crystal panel is bent, it only rubs the top surface of each convex portion of the spacer and does not affect the other, so that display defects caused by the spacer can be reliably prevented. .
  • each of the convex portions has a convex shape along the surface of each of the provided substrates, and the respective longitudinal directions are orthogonal to each other.
  • each of the convex portions forms a ridge along the surface of each substrate, and each convex portion is provided so that the longitudinal directions thereof are orthogonal to each other. Therefore, even if the relative positional relationship between the two substrates greatly changes in the longitudinal direction of each of the convex portions due to bending, the liquid crystal panel only rubs each top surface of each convex portion, which is caused by the spacer. Display defects can be prevented more reliably.
  • the liquid crystal panel according to the present invention is characterized in that a plurality of convex portions are provided on one side of the substrate and are arranged in parallel in the longitudinal direction of the convex portions provided on the other side.
  • one substrate is provided with a plurality of convex portions.
  • the plurality of convex portions are arranged in parallel in the longitudinal direction of the convex portion provided on the other substrate. Therefore, when the convex portion provided on the other substrate has a length in the longitudinal direction such that a plurality of convex portions can be arranged side by side, the relative positional relationship between the two substrates caused by bending of the liquid crystal panel or the like Changes in the longitudinal direction can be suppressed. Further, even when the relative positional relationship between the two substrates is greatly changed in the longitudinal direction, only the top surfaces of the convex portions provided on the respective substrates are rubbed. It can be surely prevented.
  • the opposing substrate includes a plurality of display elements arranged in a matrix and a plurality of signal wirings used for driving the plurality of display elements.
  • the array substrate is arranged so that the wiring does not overlap each display element, the convex portion provided on the array substrate is provided at a position overlapping the signal wiring, and the other substrate facing the display substrate is the display substrate.
  • a color filter substrate comprising a plurality of colored layers formed in a matrix so as to face the element, and a light shielding layer formed between the colored layers, and the convex portions provided on the color filter substrate, It is provided at a position overlapping the light shielding layer.
  • one substrate is an array substrate provided with a plurality of display elements arranged in a matrix and a plurality of signal wirings used for driving the plurality of display elements.
  • the plurality of signal lines are arranged so as not to overlap each display element.
  • the convex portion provided on the array substrate is provided at a position overlapping the signal wiring.
  • the other substrate is a color filter substrate including a plurality of colored layers formed in a matrix so as to face display elements included in the array substrate, and a light shielding layer formed between the colored layers.
  • the convex portion provided on the color filter substrate is provided on the light shielding layer. Therefore, by providing each convex portion constituting the spacer on the signal wiring that does not affect the display and the light shielding layer, display defects caused by the spacer can be more reliably prevented.
  • the array substrate includes an insulating film that covers the plurality of signal wirings, and the protrusions provided on the array substrate include a material that forms the insulating film. It is characterized by.
  • the array substrate includes an insulating film covering a plurality of signal wirings.
  • the convex portion provided on the array substrate includes a material for forming an insulating film. Therefore, since the convex portion can be formed at the same time when forming the insulating film, a part of the spacer can be formed efficiently.
  • the liquid crystal panel according to the present invention is characterized in that the convex portion provided on the color filter substrate includes a material for forming the colored layer.
  • the convex portion provided on the color filter substrate is configured to include a material for forming the colored layer. Accordingly, since the convex portions can be formed at the same time when the colored layer is formed, a part of the spacer can be formed efficiently.
  • each of the array substrate and the color filter substrate includes an alignment film that is aligned so that the liquid crystal material is aligned in the same direction as the longitudinal direction of the provided convex portion. To do.
  • each of the array substrate and the color filter substrate includes an alignment film that is aligned so that the liquid crystal substance is aligned in the same direction as the longitudinal direction of the provided convex portion.
  • a liquid crystal material used for a liquid crystal panel has a dielectric anisotropy and changes its direction based on an applied voltage.
  • the liquid crystal substance in the vicinity of the alignment film faces the direction in which the alignment film is subjected to alignment treatment when no voltage is applied.
  • the liquid crystal substance in the vicinity of the convex portion may face a direction that intersects the longitudinal direction of the convex portion when no voltage is applied.
  • the direction in which the alignment film has been subjected to the alignment treatment is a direction parallel to the longitudinal direction of the convex portion and a direction orthogonal to the longitudinal direction
  • the direction orthogonal to the longitudinal direction the liquid crystal substance in the vicinity of the alignment film and the liquid crystal substance in the vicinity of the convex portion are more likely to overlap in plan view.
  • Liquid crystal substances that overlap in a plan view are likely to collide when they change their orientation due to an applied voltage.
  • the liquid crystal material in which the collision has occurred may cause an alignment abnormality. Therefore, the alignment of the liquid crystal material can be stabilized by using an alignment film that is aligned so that the liquid crystal material is aligned in the same direction as the longitudinal direction of the protrusions.
  • a liquid crystal display device includes the above-described liquid crystal panel and a drive unit that drives the display element via a signal wiring included in the array substrate.
  • the present invention includes the above-described liquid crystal panel and a drive unit that drives a plurality of display elements via signal wirings included in the array substrate. Therefore, the liquid crystal display device can reliably prevent display defects caused by the spacers even when the liquid crystal panel is bent.
  • the present invention it is possible to provide a liquid crystal panel that reliably prevents display defects caused by spacers and a liquid crystal display device using the liquid crystal panel even when bending occurs.
  • FIG. 2 is a schematic diagram illustrating a configuration of a liquid crystal display device in Embodiment 1.
  • FIG. It is a typical top view in the opposing surface of an array substrate. It is a typical top view in the opposing surface of a color filter substrate.
  • 6 is a cross-sectional view illustrating a configuration of a spacer according to Embodiment 2.
  • FIG. FIG. 9 is a schematic plan view schematically showing a liquid crystal panel for illustrating the arrangement of spacers in a third embodiment.
  • FIG. 1 is a schematic diagram illustrating a configuration of the liquid crystal display device according to the first embodiment.
  • the liquid crystal display device includes a liquid crystal panel 1 and a drive unit 2.
  • the liquid crystal panel 1 includes a rectangular array substrate 11 and a color filter substrate 12, and the array substrate 11 and the color filter substrate 12 face each other.
  • the array substrate 11 is provided with a display element formed in a matrix on a glass substrate and a plurality of signal wirings connected to the driving unit 2 and used for driving the display element. Transmits incident light.
  • Each display element includes a TFT and a pixel electrode.
  • the array substrate 11 includes an insulating film that covers the display element and the signal wiring, and an alignment film that covers the insulating film. The alignment film is formed on the opposite surface of the array substrate 11 and aligns a liquid crystal material described later. Details of the configuration of the array substrate 11 will be described later.
  • the color filter substrate 12 is formed with a color filter (colored layer) and a black matrix (light-shielding layer) on a glass substrate, and transmitted light from the array substrate 11 enters from the opposite surface and is transmitted through the color filter.
  • the color filter substrate 12 includes a transparent conductive film that covers the color filter and the black matrix, and an alignment film that covers the transparent conductive film.
  • the alignment film is formed on the opposite surface of the color filter substrate 12 and aligns a liquid crystal material described later. Details of the configuration of the color filter substrate 12 will be described later.
  • a spacer is formed between the array substrate 11 and the color filter substrate 12 in the liquid crystal panel 1 configured as described above, and a liquid crystal substance is sealed in the gap held by the spacer.
  • the spacer in the present invention includes convex portions protruding from the array substrate 11 and the color filter substrate 12 respectively.
  • the driving unit 2 includes a gate driver 21 and a source driver 22.
  • the gate driver 21 and the source driver 22 are connected to the signal wiring described above, and apply a voltage to each gate and source of each TFT.
  • the gate driver 21 and the source driver 22 adjust the degree of alignment of the liquid crystal material by controlling the voltage value applied to the TFT, and control the amount of light transmitted through the array substrate 11.
  • FIG. 2 is a schematic plan view of the facing surface of the array substrate 11.
  • the array substrate 11 includes a plurality of display elements arranged in a matrix and a plurality of signal wirings 114 provided between the display elements.
  • the display element includes a TFT 112 and a pixel electrode 113, and is formed by photolithography.
  • the TFT 112 functions as a switching element based on voltages applied by the gate driver 21 and the source driver 22.
  • the voltage applied to the pixel electrode 113 is controlled by controlling the TFT 112 by the gate driver 21 and the source driver 22.
  • the plurality of signal wirings 114 are metal film-like wirings arranged in the vertical direction and the horizontal direction, and are formed by sputtering.
  • a set of signal wirings 114 in the vertical direction or the horizontal direction is connected to the gate driver 21 or the source driver 22, respectively.
  • the array substrate 11 is provided with a ridge 111 extending in the left-right direction.
  • the ridges 111 are provided at positions that overlap the signal wirings 114 arranged in the left-right direction and intersect the signal wirings 114 arranged in the up-down direction.
  • FIG. 3 is a schematic plan view of the facing surface of the color filter substrate 12.
  • the color filter substrate 12 includes a plurality of color filters 123 arranged in a matrix so as to face the above-described display elements, and a grid-like black matrix 122 arranged between the color filters 123.
  • the color filter 123 and the black matrix 122 are each formed by photolithography.
  • the black matrix 122 has a light blocking property and blocks light transmission through the color filter substrate 12.
  • the color filters 123 adjacent in the left-right direction represent different colors.
  • the color filter substrate 12 is provided with a ridge 121 extending in the vertical direction.
  • the ridge 121 is provided at a position that overlaps the black matrix 122 arranged in the vertical direction and intersects the black matrix 122 arranged in the horizontal direction.
  • FIG. 4 is a schematic plan view schematically showing the liquid crystal panel 1 for showing the arrangement of the spacers 3.
  • FIG. 4 shows a schematic plan view when the color filter substrate 12 overlaps the array substrate 11.
  • the directions indicated by the arrows in the figure will be described as up, down, left and right directions.
  • the ridges 121 overlap with the ridges 111 so that their longitudinal directions are orthogonal to each other, and the set of the ridges 111 and 121 is the spacer 3 of the liquid crystal panel 1. Function as.
  • the length of the ridge 111 and the ridge 121 functioning as the spacer 3 is longer than 50 ⁇ m and the length in the short direction. Is longer than 5 ⁇ m.
  • the liquid crystal panel 1 is provided with a plurality of sets of the ridges 111 and the ridges 121 provided in this way.
  • the longitudinal direction of the protrusions 111 and 121 is preferably the same as the direction in which the alignment film aligns the liquid crystal substance, but is different from the alignment direction. There may be.
  • FIG. 5 is a cross-sectional view showing the configuration of the spacer 3.
  • FIG. 5 shows a cross section in which the overlapping portions of the ridges 111 and the ridges 121 in FIG. 4 are cut in the left-right direction, and is enclosed in the array substrate 11 and the color filter substrate 12 facing each other and the gap between the substrates.
  • a liquid crystal material 4 is shown.
  • a black matrix 122, a transparent conductive film 125, and an alignment film 126 are laminated on a glass substrate 124 on the opposite surface side.
  • the transparent conductive film 125 is formed over the entire surface of the glass substrate 124 so as to cover the black matrix 122 and the color filter 123, and functions as a common electrode in a portion covering the color filter 123, that is, a portion facing the pixel electrode 113.
  • a protrusion 127 is formed on a part of the transparent conductive film 125.
  • the protrusion 127 is made of a special spacer material used for a so-called photo spacer, and is formed by photolithography.
  • the alignment film 126 is formed over the entire surface of the glass substrate 124 so as to cover the transparent conductive film 125 and the protrusions 127.
  • the above-described ridge 121 is constituted by the ridge 127 and a part of the alignment film 126 that covers the ridge 127.
  • the signal wiring 114, the insulating film 116, and the alignment film 117 are laminated on the glass substrate 115 on the opposite surface side.
  • the signal wiring 114 is a metal film connected to the gate driver 21 when connected to the gate of the TFT 112, and is a metal film connected to the source driver 22 when connected to the source of the TFT 112.
  • the insulating film 116 is formed over the entire surface of the glass substrate 115 so as to cover the source, drain, and gate electrodes of the TFT 112 and the pixel electrode 113. Further, a protrusion 118 is formed on a part of the insulating film 116. Similarly to the ridge 127, the ridge 118 is made of a dedicated spacer material and is formed by photolithography.
  • the alignment film 117 is formed over the entire surface of the glass substrate 115 so as to cover the insulating film 116 and the protrusions 118.
  • the above-mentioned ridge 111 is constituted by the ridge 118 and a part of the alignment film 117 that covers the ridge 118.
  • the ridges 111 and the ridges 121 are formed by photolithography using a dedicated spacer material used for so-called photo spacers. A part of the top surface of the ridge 111 is in contact with a part of the top surface of the ridge 121.
  • the liquid crystal panel 1 having the above configuration, even when the relative positional relationship between the array substrate 11 and the color filter substrate 12 changes due to bending, the top surfaces of the ridges 111 and the ridges 121 are rubbed against each other. It is. In other words, the alignment film formed on the pixel electrode 113 and the color filter 123 is not rubbed even when the spacer 3 is displaced due to bending in the liquid crystal panel 1. Therefore, the liquid crystal panel 1 and the liquid crystal display device including the liquid crystal panel 1 can reliably prevent display defects caused by the spacers 3 even when the liquid crystal panel 1 is bent.
  • Embodiment 2 In Embodiment 1, the ridge 118 and the ridge 127 which are a part of the ridge 111 and the ridge 121 have been described as being formed using a dedicated spacer material. In Embodiment 2, an example in which the ridges 111 and the ridges 121 are formed without using the spacer material will be described. Since other configurations and operations except for the portions described below are the same as those in the first embodiment, detailed description on the same configuration and description of the operation and effects are omitted for the sake of brevity.
  • FIG. 6 is a cross-sectional view showing the configuration of the spacer 3 in the second embodiment.
  • a first colored layer 128 and a second colored layer 129 are laminated on a part of the black matrix 122 to form a ridge.
  • the transparent conductive film 125 is formed over the entire surface of the glass substrate 124 so as to cover the black matrix 122 and the protrusions.
  • the alignment film 126 is formed over the entire surface of the glass substrate 124 so as to cover the transparent conductive film 125.
  • the ridge 121 includes a ridge formed of the first colored layer 128 and the second colored layer 129, a part of the transparent conductive film 125 covering the ridge, and a part of the alignment film covering the part of the transparent conductive film 125. 126.
  • the first colored layer 128 and the second colored layer 129 are formed at the same time when the color filter 123 representing each color is formed.
  • a part of the insulating film 116 protrudes to form a ridge.
  • the alignment film 117 is formed over the entire surface of the glass substrate 115 so as to cover the insulating film 116 including the protrusions.
  • the ridge 111 is composed of a ridge portion of the insulating film 116 and a part of the alignment film 117 covering the ridge portion.
  • a multi-tone mask such as a gray-tone mask or a half-tone mask is used, so that the projection has a protruding portion.
  • An insulating film 116 is formed.
  • Part of the ridges 111 and the ridges 121 of the liquid crystal panel 1 having the above-described configuration is a process of forming the color filter 123, the transparent conductive film 125, or the insulating film 116 without using a dedicated spacer material. Can be formed. Accordingly, it is not necessary to provide a separate step for forming the spacer 3, and the spacer 3 can be formed efficiently.
  • FIG. 7 is a schematic plan view schematically showing the liquid crystal panel 1 for illustrating the arrangement of the spacers 3 in the third embodiment.
  • the ridge 121 is provided so as to extend longer in the vertical direction than the ridge 121 described in the first and second embodiments and overlap the plurality of ridges 111. That is, the plurality of ridges 111 are juxtaposed in the longitudinal direction of the ridge 121.
  • the set of the ridge 121 and the plurality of ridges 111 functions as the spacer 3 of the liquid crystal panel 1.
  • the ridge 121 has a length in the longitudinal direction so that the plurality of ridges 111 can be arranged side by side. A change in the longitudinal direction in the positional relationship can be suppressed. In addition, even when the relative positional relationship between the two substrates is greatly changed in the longitudinal direction, only the top surface of each ridge is rubbed, so that display defects caused by the spacers 3 can be reliably prevented. Can do.
  • the ridge 111 is provided at a position overlapping the signal wiring 114, and the ridge 121 is provided at a position overlapping the black matrix 122.
  • the protrusions 121 are provided at other locations. Also good.
  • the ridges 111 and the ridges 121 are provided so that their longitudinal directions are orthogonal to each other, but other embodiments may be used.
  • the ridges 111 and the ridges 121 may be provided so as to overlap each other in the longitudinal direction.
  • the protrusion 111 includes a part of the alignment film 117 and the protrusion 121 includes a part of the alignment film 126, but each protrusion is formed without including it. May be. That is, the alignment film 117 may be stacked on the insulating film 116 except for the protruding portion, and the alignment film 126 may be stacked on the transparent conductive film 125 except for the protruding portion.

Abstract

Provided are: a liquid crystal panel which reliably prevents display failure caused by a spacer even in cases where the liquid crystal panel is bent; and a liquid crystal display device which uses this liquid crystal panel. A liquid crystal panel which is obtained by sealing a liquid crystal material in a space that is held by a spacer formed between substrates facing each other. The spacer comprises projection parts (111, 121) protruding from respective facing surfaces of the substrates facing each other, and at least a part of the top surface of one of the projection part (111) or the projection part (121) is in contact with at least a part of the top surface of the other one of the projection part (111) or the projection part (121).

Description

液晶パネル及び液晶表示装置Liquid crystal panel and liquid crystal display device
　本発明は、対向する基板間に形成されたスペーサで保持された空隙に液晶物質が封入されてある液晶パネル、及び該液晶パネルを用いてなる液晶表示装置に関する。 The present invention relates to a liquid crystal panel in which a liquid crystal substance is sealed in a gap held by a spacer formed between opposing substrates, and a liquid crystal display device using the liquid crystal panel.
　一般的に、液晶表示装置が備える液晶パネルは、ガラス薄板からなる対向した２枚の透光性基板と、これらの基板間の空隙に封入された液晶物質とを有している。一方の基板は、マトリクス状に配置された表示素子と、各表示素子を駆動させるために表示素子間に配された信号配線とを備えるアレイ基板である。例えば、アクティブマトリクス型の液晶表示装置において、表示素子は、薄膜トランジスタ（ＴＦＴ：Thin Film Transistor）と画素電極とを含んで構成される。また、アレイ基板の対向面上には、液晶物質を配向する配向膜が形成されている。他方の基板は、表示素子に対向する着色層（カラーフィルタ）と、該着色層の間の遮光層（ブラックマトリクス）とが形成されているカラーフィルタ基板であり、対向面上には配向膜が形成されている。 Generally, a liquid crystal panel included in a liquid crystal display device has two light-transmitting substrates that are made of thin glass plates and a liquid crystal substance sealed in a gap between the substrates. One substrate is an array substrate that includes display elements arranged in a matrix and signal wirings arranged between the display elements to drive the display elements. For example, in an active matrix liquid crystal display device, a display element includes a thin film transistor (TFT: Thin Film Transistor) and a pixel electrode. An alignment film for aligning the liquid crystal material is formed on the opposing surface of the array substrate. The other substrate is a color filter substrate in which a colored layer (color filter) facing the display element and a light shielding layer (black matrix) between the colored layers are formed, and an alignment film is formed on the facing surface. Is formed.
　また、一般にアレイ基板及びカラーフィルタ基板間の空隙を維持するためにスペーサが設けられている。スペーサは、配向膜と当接するように設けられている。従来の液晶パネルは、例えば、基板間に不規則に分散して設けられた透明な球状のスペーサ、又はブラックマトリクスに重なり、かつカラーフィルタに重ならないように設けられた柱状の所謂フォトスペーサ等を採用している（例えば特許文献１参照）。 In general, a spacer is provided to maintain a gap between the array substrate and the color filter substrate. The spacer is provided in contact with the alignment film. Conventional liquid crystal panels include, for example, transparent spherical spacers that are irregularly distributed between substrates, or columnar so-called photo spacers that are provided so as to overlap a black matrix and not to overlap a color filter. (For example, refer to Patent Document 1).
特開２００６－３３００２４号公報JP 2006-330024 A
　しかしながら、従来の液晶パネルにおいては、外部からの加重又は自重等の影響によって撓みが生じたとき、アレイ基板及びカラーフィルタ基板の相対的な位置関係が変化することに起因し、スペーサが当接している配向膜を擦る虞があった。その場合、表示素子又はカラーフィルタ上に位置する配向膜が擦れることによって、液晶物質を所望の方向に配向することができなくなる配向異常が生じ、光漏れ等の表示不良の原因となる。 However, in the conventional liquid crystal panel, when the flexure occurs due to the influence of external weight or self-weight, the spacers are in contact with each other because the relative positional relationship between the array substrate and the color filter substrate changes. There was a risk of rubbing the alignment film. In that case, the alignment film positioned on the display element or the color filter is rubbed, thereby causing an alignment abnormality in which the liquid crystal substance cannot be aligned in a desired direction, which causes display defects such as light leakage.
　本発明は斯かる事情に鑑みてなされたものであり、本発明の目的は、撓みが生じた場合であっても、スペーサに起因する表示不良を確実に防止する液晶パネル及び該液晶パネルを用いてなる液晶表示装置を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is to use a liquid crystal panel that reliably prevents display defects caused by spacers even when bending occurs, and the liquid crystal panel. The liquid crystal display device is provided.
　本発明に係る液晶パネルは、対向する基板間に形成されたスペーサで保持された空隙に液晶物質が封入されてある液晶パネルにおいて、前記スペーサは、前記対向する基板の各対向面から突出する凸部を含み、一方の凸部における頂面の少なくとも一部は、他方の凸部における頂面の少なくとも一部に当接してあることを特徴とする。 The liquid crystal panel according to the present invention is a liquid crystal panel in which a liquid crystal material is sealed in a gap held by a spacer formed between opposing substrates, wherein the spacer protrudes from each opposing surface of the opposing substrate. And at least a part of the top surface of one convex part is in contact with at least a part of the top surface of the other convex part.
　本発明にあっては、スペーサは、対向する基板の各対向面から突出する凸部を含む。一方の凸部における頂面の少なくとも一部は、他方の凸部における頂面の少なくとも一部に当接してある。従って、液晶パネルが撓んだ場合であっても、スペーサの凸部夫々の頂面を擦るだけであり、他に影響を及ぼさないため、スペーサに起因する表示不良を確実に防止することができる。 In the present invention, the spacer includes a convex portion protruding from each facing surface of the opposing substrate. At least a part of the top surface of one convex part is in contact with at least a part of the top surface of the other convex part. Therefore, even when the liquid crystal panel is bent, it only rubs the top surface of each convex portion of the spacer and does not affect the other, so that display defects caused by the spacer can be reliably prevented. .
　本発明に係る液晶パネルは、前記凸部夫々は、設けられている基板夫々の面に沿う凸条をなし、各長手方向が直交するように設けられていることを特徴とする。 The liquid crystal panel according to the present invention is characterized in that each of the convex portions has a convex shape along the surface of each of the provided substrates, and the respective longitudinal directions are orthogonal to each other.
　本発明にあっては、凸部夫々は基板夫々の面に沿う凸条をなしており、各凸部は夫々の長手方向が直交するように設けられている。従って、液晶パネルは撓みにより、両基板の相対的位置関係が凸部夫々の長手方向に大きく変化した場合であっても、各凸部の頂面夫々を擦るだけであるため、スペーサに起因する表示不良をより確実に防止することができる。 In the present invention, each of the convex portions forms a ridge along the surface of each substrate, and each convex portion is provided so that the longitudinal directions thereof are orthogonal to each other. Therefore, even if the relative positional relationship between the two substrates greatly changes in the longitudinal direction of each of the convex portions due to bending, the liquid crystal panel only rubs each top surface of each convex portion, which is caused by the spacer. Display defects can be prevented more reliably.
　本発明に係る液晶パネルは、前記基板の一方に複数の凸部が設けられてあり、他方に設けられた凸部の長手方向に並設されていることを特徴とする。 The liquid crystal panel according to the present invention is characterized in that a plurality of convex portions are provided on one side of the substrate and are arranged in parallel in the longitudinal direction of the convex portions provided on the other side.
　本発明にあっては、一方の基板は、凸部が複数設けられている。複数設けられた凸部は、他方の基板に設けられた凸部の長手方向に並設されている。従って、他方の基板に設けられた凸部は、複数設けられた凸部が並設できるような長さを長手方向に有する場合、液晶パネルの撓み等によって生じる両基板の相対的位置関係における当該長手方向への変化を抑制することができる。また、両基板の相対的位置関係が当該長手方向に大きく変化した場合であっても、各基板に設けられた凸部の頂面夫々を擦るだけであるため、スペーサに起因する表示不良をより確実に防止することができる。 In the present invention, one substrate is provided with a plurality of convex portions. The plurality of convex portions are arranged in parallel in the longitudinal direction of the convex portion provided on the other substrate. Therefore, when the convex portion provided on the other substrate has a length in the longitudinal direction such that a plurality of convex portions can be arranged side by side, the relative positional relationship between the two substrates caused by bending of the liquid crystal panel or the like Changes in the longitudinal direction can be suppressed. Further, even when the relative positional relationship between the two substrates is greatly changed in the longitudinal direction, only the top surfaces of the convex portions provided on the respective substrates are rubbed. It can be surely prevented.
　本発明に係る液晶パネルは、前記対向する一方の基板は、マトリクス状に配置された複数の表示素子と、該複数の表示素子の駆動に用いられる複数の信号配線とを備え、該複数の信号配線が各表示素子に重ならないように配してあるアレイ基板であり、該アレイ基板に設けられた凸部は、前記信号配線と重なる位置に設けられ、前記対向する他方の基板は、前記表示素子に対向するようにマトリクス状に形成された複数の着色層と、該着色層の間に形成された遮光層とを備えるカラーフィルタ基板であり、該カラーフィルタ基板に設けられた凸部は、前記遮光層と重なる位置に設けられていることを特徴とする。 In the liquid crystal panel according to the present invention, the opposing substrate includes a plurality of display elements arranged in a matrix and a plurality of signal wirings used for driving the plurality of display elements. The array substrate is arranged so that the wiring does not overlap each display element, the convex portion provided on the array substrate is provided at a position overlapping the signal wiring, and the other substrate facing the display substrate is the display substrate. A color filter substrate comprising a plurality of colored layers formed in a matrix so as to face the element, and a light shielding layer formed between the colored layers, and the convex portions provided on the color filter substrate, It is provided at a position overlapping the light shielding layer.
　本発明にあっては、一方の基板は、マトリクス状に配置された複数の表示素子と、該複数の表示素子の駆動に用いられる複数の信号配線とを備えたアレイ基板である。複数の信号配線は、各表示素子に重ならないように配されている。アレイ基板に設けられた凸部は、信号配線と重なる位置に設けられている。また、他方の基板は、アレイ基板が備える表示素子に対向するようにマトリクス状に形成された複数の着色層と、当該着色層の間に形成された遮光層とを備えるカラーフィルタ基板である。カラーフィルタ基板に設けられた凸部は、遮光層上に設けられている。従って、表示に影響を及ぼさない信号配線上及び遮光層上にスペーサを構成する各凸部を設けることによって、スペーサに起因する表示不良をより確実に防止することができる。 In the present invention, one substrate is an array substrate provided with a plurality of display elements arranged in a matrix and a plurality of signal wirings used for driving the plurality of display elements. The plurality of signal lines are arranged so as not to overlap each display element. The convex portion provided on the array substrate is provided at a position overlapping the signal wiring. The other substrate is a color filter substrate including a plurality of colored layers formed in a matrix so as to face display elements included in the array substrate, and a light shielding layer formed between the colored layers. The convex portion provided on the color filter substrate is provided on the light shielding layer. Therefore, by providing each convex portion constituting the spacer on the signal wiring that does not affect the display and the light shielding layer, display defects caused by the spacer can be more reliably prevented.
　本発明に係る液晶パネルは、前記アレイ基板は、前記複数の信号配線を覆ってある絶縁膜を備え、前記アレイ基板に設けられた凸部は、前記絶縁膜を形成する材料を含んで構成されていることを特徴とする。 In the liquid crystal panel according to the present invention, the array substrate includes an insulating film that covers the plurality of signal wirings, and the protrusions provided on the array substrate include a material that forms the insulating film. It is characterized by.
　本発明にあっては、アレイ基板は、複数の信号配線を覆ってある絶縁膜を備える。アレイ基板に設けられた凸部は、絶縁膜を形成する材料を含んで構成されている。従って、絶縁膜を形成するときに当該凸部を同時に形成することができるため、効率よくスペーサの一部を形成することができる。 In the present invention, the array substrate includes an insulating film covering a plurality of signal wirings. The convex portion provided on the array substrate includes a material for forming an insulating film. Therefore, since the convex portion can be formed at the same time when forming the insulating film, a part of the spacer can be formed efficiently.
　本発明に係る液晶パネルは、前記カラーフィルタ基板に設けられた凸部は、前記着色層を形成する材料を含んで構成されていることを特徴とする。 The liquid crystal panel according to the present invention is characterized in that the convex portion provided on the color filter substrate includes a material for forming the colored layer.
　本発明にあっては、カラーフィルタ基板に設けられた凸部は、着色層を形成する材料を含んで構成されている。従って、着色層を形成するときに当該凸部を同時に形成することができるため、効率よくスペーサの一部を形成することができる。 In the present invention, the convex portion provided on the color filter substrate is configured to include a material for forming the colored layer. Accordingly, since the convex portions can be formed at the same time when the colored layer is formed, a part of the spacer can be formed efficiently.
　本発明に係る液晶パネルは、前記アレイ基板及びカラーフィルタ基板夫々は、設けられた凸部の長手方向と同じ方向に前記液晶物質が配向するように配向処理された配向膜を備えることを特徴とする。 The liquid crystal panel according to the present invention is characterized in that each of the array substrate and the color filter substrate includes an alignment film that is aligned so that the liquid crystal material is aligned in the same direction as the longitudinal direction of the provided convex portion. To do.
　本発明にあっては、アレイ基板及びカラーフィルタ基板夫々は、設けられた凸部の長手方向と同じ方向に液晶物質が配向するように配向処理された配向膜を備える。一般に、液晶パネルに用いられる液晶物質は誘電率異方性を有し、印加される電圧に基づいて向きを変える。配向膜近傍の液晶物質は、電圧が印加されていないとき、当該配向膜に配向処理を施した方向を向く。例えば垂直配向モードの場合、凸部近傍の液晶物質は、電圧が印加されていないときに凸部の長手方向と交差する方向を向くことがある。例えば、配向膜が配向処理を施した方向が、凸部の長手方向に平行な方向のときと、当該長手方向に直交する方向のときとで比較した場合、当該長手方向に直交する方向のときの方が、当該配向膜近傍の液晶物質と凸部近傍の液晶物質とが平面視で重なり合い易い。平面視で重なり合った液晶物質同士は、印加される電圧に起因して向きを変えるとき、衝突が生じ易い。衝突が生じた液晶物質は、配向異常を起こす虞がある。従って、凸部の長手方向と同じ方向に液晶物質が配向するように配向処理された配向膜を用いることで、液晶物質の配向を安定させることができる。 In the present invention, each of the array substrate and the color filter substrate includes an alignment film that is aligned so that the liquid crystal substance is aligned in the same direction as the longitudinal direction of the provided convex portion. Generally, a liquid crystal material used for a liquid crystal panel has a dielectric anisotropy and changes its direction based on an applied voltage. The liquid crystal substance in the vicinity of the alignment film faces the direction in which the alignment film is subjected to alignment treatment when no voltage is applied. For example, in the case of the vertical alignment mode, the liquid crystal substance in the vicinity of the convex portion may face a direction that intersects the longitudinal direction of the convex portion when no voltage is applied. For example, when the direction in which the alignment film has been subjected to the alignment treatment is a direction parallel to the longitudinal direction of the convex portion and a direction orthogonal to the longitudinal direction, the direction orthogonal to the longitudinal direction In this case, the liquid crystal substance in the vicinity of the alignment film and the liquid crystal substance in the vicinity of the convex portion are more likely to overlap in plan view. Liquid crystal substances that overlap in a plan view are likely to collide when they change their orientation due to an applied voltage. The liquid crystal material in which the collision has occurred may cause an alignment abnormality. Therefore, the alignment of the liquid crystal material can be stabilized by using an alignment film that is aligned so that the liquid crystal material is aligned in the same direction as the longitudinal direction of the protrusions.
　本発明に係る液晶表示装置は、上述の液晶パネルと、前記アレイ基板が有する信号配線を介して前記表示素子を駆動する駆動部とを備えることを特徴とする。 A liquid crystal display device according to the present invention includes the above-described liquid crystal panel and a drive unit that drives the display element via a signal wiring included in the array substrate.
　本発明にあっては、上述の液晶パネルと、アレイ基板が有する信号配線を介して複数の表示素子を駆動する駆動部とを備える。従って、液晶表示装置は、液晶パネルに撓みが生じた場合であっても、スペーサに起因する表示不良を確実に防止することができる。 The present invention includes the above-described liquid crystal panel and a drive unit that drives a plurality of display elements via signal wirings included in the array substrate. Therefore, the liquid crystal display device can reliably prevent display defects caused by the spacers even when the liquid crystal panel is bent.
　本発明によれば、撓みが生じた場合であっても、スペーサに起因する表示不良を確実に防止する液晶パネル及び該液晶パネルを用いてなる液晶表示装置を提供することができる。 According to the present invention, it is possible to provide a liquid crystal panel that reliably prevents display defects caused by spacers and a liquid crystal display device using the liquid crystal panel even when bending occurs.
実施の形態１における液晶表示装置の構成を示す模式図である。2 is a schematic diagram illustrating a configuration of a liquid crystal display device in Embodiment 1. FIG. アレイ基板の対向面における模式的平面図である。It is a typical top view in the opposing surface of an array substrate. カラーフィルタ基板の対向面における模式的平面図である。It is a typical top view in the opposing surface of a color filter substrate. スペーサの配置を示すための液晶パネルを略示する模式的平面図である。It is a schematic plan view which shows schematically the liquid crystal panel for showing arrangement | positioning of a spacer. スペーサの構成を示す断面図である。It is sectional drawing which shows the structure of a spacer. 実施の形態２におけるスペーサの構成を示す断面図である。6 is a cross-sectional view illustrating a configuration of a spacer according to Embodiment 2. FIG. 実施の形態３におけるスペーサの配置を示すための液晶パネルを略示する模式的平面図である。FIG. 9 is a schematic plan view schematically showing a liquid crystal panel for illustrating the arrangement of spacers in a third embodiment.
　以下、本発明をその実施の形態を示す図面に基づいて詳述する。 Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
　（実施の形態１）
　図１は、実施の形態１における液晶表示装置の構成を示す模式図である。液晶表示装置は、液晶パネル１及び駆動部２を備える。液晶パネル１は、矩形状のアレイ基板１１及びカラーフィルタ基板１２を含んでおり、アレイ基板１１及びカラーフィルタ基板１２は対向している。アレイ基板１１は、ガラス基板上にマトリクス状に形成された表示素子と、駆動部２に接続し、当該表示素子の駆動に用いられる複数の信号配線とを設けてあり、対向面の反対面から入射される光を透過させる。各表示素子はＴＦＴ及び画素電極を含んで構成される。また、アレイ基板１１は、表示素子及び信号配線を覆う絶縁膜、並びに該絶縁膜を覆う配向膜を備える。配向膜は、アレイ基板１１の対向面上に形成され、後述の液晶物質を配向する。なお、アレイ基板１１の構成の詳細は後述する。 (Embodiment 1)
FIG. 1 is a schematic diagram illustrating a configuration of the liquid crystal display device according to the first embodiment. The liquid crystal display device includes a liquid crystal panel 1 and a drive unit 2. The liquid crystal panel 1 includes a rectangular array substrate 11 and a color filter substrate 12, and the array substrate 11 and the color filter substrate 12 face each other. The array substrate 11 is provided with a display element formed in a matrix on a glass substrate and a plurality of signal wirings connected to the driving unit 2 and used for driving the display element. Transmits incident light. Each display element includes a TFT and a pixel electrode. The array substrate 11 includes an insulating film that covers the display element and the signal wiring, and an alignment film that covers the insulating film. The alignment film is formed on the opposite surface of the array substrate 11 and aligns a liquid crystal material described later. Details of the configuration of the array substrate 11 will be described later.
　カラーフィルタ基板１２は、ガラス基板上にカラーフィルタ（着色層）及びブラックマトリクス（遮光層）が形成され、アレイ基板１１からの透過光が対向面から入射し、カラーフィルタを介して透過する。また、カラーフィルタ基板１２は、カラーフィルタ及びブラックマトリクスを覆う透明導電膜、並びに該透明導電膜を覆う配向膜を備える。配向膜は、カラーフィルタ基板１２の対向面上に形成され、後述の液晶物質を配向する。なお、カラーフィルタ基板１２の構成の詳細は後述する。 The color filter substrate 12 is formed with a color filter (colored layer) and a black matrix (light-shielding layer) on a glass substrate, and transmitted light from the array substrate 11 enters from the opposite surface and is transmitted through the color filter. The color filter substrate 12 includes a transparent conductive film that covers the color filter and the black matrix, and an alignment film that covers the transparent conductive film. The alignment film is formed on the opposite surface of the color filter substrate 12 and aligns a liquid crystal material described later. Details of the configuration of the color filter substrate 12 will be described later.
　このように構成された液晶パネル１におけるアレイ基板１１及びカラーフィルタ基板１２の間にはスペーサが形成され、当該スペーサにより保持された空隙には液晶物質が封入されている。本発明におけるスペーサは、アレイ基板１１及びカラーフィルタ基板１２夫々から突出する凸部を含んでいる。 A spacer is formed between the array substrate 11 and the color filter substrate 12 in the liquid crystal panel 1 configured as described above, and a liquid crystal substance is sealed in the gap held by the spacer. The spacer in the present invention includes convex portions protruding from the array substrate 11 and the color filter substrate 12 respectively.
　駆動部２は、ゲートドライバ２１及びソースドライバ２２を有する。ゲートドライバ２１及びソースドライバ２２は、上述の信号配線に接続され、各ＴＦＴのゲート及びソース夫々に電圧を印加する。ゲートドライバ２１及びソースドライバ２２は、ＴＦＴへ印加する電圧値を制御することによって液晶物質の配向程度を調整し、アレイ基板１１の光の透過量を制御する。 The driving unit 2 includes a gate driver 21 and a source driver 22. The gate driver 21 and the source driver 22 are connected to the signal wiring described above, and apply a voltage to each gate and source of each TFT. The gate driver 21 and the source driver 22 adjust the degree of alignment of the liquid crystal material by controlling the voltage value applied to the TFT, and control the amount of light transmitted through the array substrate 11.
　図２は、アレイ基板１１の対向面における模式的平面図である。ただし、図２においては、上述の絶縁膜及び配向膜を除き、表示素子、信号配線１１４、及び凸条１１１の配置関係を表している。以下、図中において矢印で示す方向を上下左右方向として説明する。アレイ基板１１は、マトリクス状に配された複数の表示素子及び当該表示素子の間に設けられた複数の信号配線１１４を含んで構成される。表示素子は、ＴＦＴ１１２及び画素電極１１３を含み、フォトリソグラフィによって形成されている。ＴＦＴ１１２は、ゲートドライバ２１及びソースドライバ２２による印加される電圧に基づいて、スイッチング素子として機能する。画素電極１１３は、ゲートドライバ２１及びソースドライバ２２によってＴＦＴ１１２が制御されることによって、印加される電圧が制御される。複数の信号配線１１４は、上下方向及び左右方向に配された金属膜状の配線であり、スパッタリングによって形成されている。上下方向又は左右方向の信号配線１１４の集合は夫々、ゲートドライバ２１又はソースドライバ２２に接続されている。 FIG. 2 is a schematic plan view of the facing surface of the array substrate 11. However, in FIG. 2, the arrangement relationship of the display element, the signal wiring 114, and the protrusions 111 is shown except for the insulating film and the alignment film. Hereinafter, the directions indicated by the arrows in the figure will be described as up, down, left and right directions. The array substrate 11 includes a plurality of display elements arranged in a matrix and a plurality of signal wirings 114 provided between the display elements. The display element includes a TFT 112 and a pixel electrode 113, and is formed by photolithography. The TFT 112 functions as a switching element based on voltages applied by the gate driver 21 and the source driver 22. The voltage applied to the pixel electrode 113 is controlled by controlling the TFT 112 by the gate driver 21 and the source driver 22. The plurality of signal wirings 114 are metal film-like wirings arranged in the vertical direction and the horizontal direction, and are formed by sputtering. A set of signal wirings 114 in the vertical direction or the horizontal direction is connected to the gate driver 21 or the source driver 22, respectively.
　また、アレイ基板１１には、左右方向に延びる凸条１１１が設けられている。凸条１１１は、左右方向に配された信号配線１１４と重なる位置であって、上下方向に配された信号配線１１４と交差する位置に設けられている。 The array substrate 11 is provided with a ridge 111 extending in the left-right direction. The ridges 111 are provided at positions that overlap the signal wirings 114 arranged in the left-right direction and intersect the signal wirings 114 arranged in the up-down direction.
　図３は、カラーフィルタ基板１２の対向面における模式的平面図である。ただし、図３においては、上述の透明導電膜及び配向膜を除き、カラーフィルタ１２３、ブラックマトリクス１２２、及び凸条１２１の配置関係を表している。以下、図中において矢印で示す方向を上下左右方向として説明する。カラーフィルタ基板１２は、上述の表示素子に対向するようにマトリクス状に配された複数のカラーフィルタ１２３及び当該カラーフィルタ１２３の間に配された格子状のブラックマトリクス１２２を含んでいる。カラーフィルタ１２３及びブラックマトリクス１２２は夫々、フォトリソグラフィによって形成されている。ブラックマトリクス１２２は遮光性を有し、カラーフィルタ基板１２における光の透過を遮る。左右方向に隣り合うカラーフィルタ１２３は、互いに異なる色を表す。 FIG. 3 is a schematic plan view of the facing surface of the color filter substrate 12. However, in FIG. 3, the arrangement | positioning relationship of the color filter 123, the black matrix 122, and the protruding item | line 121 is represented except the above-mentioned transparent conductive film and alignment film. Hereinafter, the directions indicated by the arrows in the figure will be described as up, down, left and right directions. The color filter substrate 12 includes a plurality of color filters 123 arranged in a matrix so as to face the above-described display elements, and a grid-like black matrix 122 arranged between the color filters 123. The color filter 123 and the black matrix 122 are each formed by photolithography. The black matrix 122 has a light blocking property and blocks light transmission through the color filter substrate 12. The color filters 123 adjacent in the left-right direction represent different colors.
　また、カラーフィルタ基板１２には、上下方向に延びる凸条１２１が設けられている。凸条１２１は、上下方向に配されたブラックマトリクス１２２と重なる位置であって、左右方向に配されたブラックマトリクス１２２と交差する位置に設けられている。 The color filter substrate 12 is provided with a ridge 121 extending in the vertical direction. The ridge 121 is provided at a position that overlaps the black matrix 122 arranged in the vertical direction and intersects the black matrix 122 arranged in the horizontal direction.
　図４は、スペーサ３の配置を示すための液晶パネル１を略示する模式的平面図である。図４には、アレイ基板１１にカラーフィルタ基板１２が重なったときの模式的平面図が示されている。以下、図中において矢印で示す方向を上下左右方向として説明する。アレイ基板１１にカラーフィルタ基板１２が重なったとき、凸条１１１に凸条１２１は夫々の長手方向が直交するように重なり、当該凸条１１１及び凸条１２１の組は、液晶パネル１のスペーサ３として機能する。スペーサ３として機能する凸条１１１及び凸条１２１は夫々、例えば液晶パネル１の大きさが６０～７０インチ程度であったとき、長手方向の長さが５０μｍよりも長く、短手方向の長さが５μｍよりも長い。このように設けられた凸条１１１及び凸条１２１の組は、液晶パネル１に複数備えられる。なお、凸条１１１及び凸条１２１の長手方向は、液晶物質の配向を安定させるために、配向膜が液晶物質を配向する方向と同じであることが好ましいが、当該配向する方向と異なる方向であってもよい。 FIG. 4 is a schematic plan view schematically showing the liquid crystal panel 1 for showing the arrangement of the spacers 3. FIG. 4 shows a schematic plan view when the color filter substrate 12 overlaps the array substrate 11. Hereinafter, the directions indicated by the arrows in the figure will be described as up, down, left and right directions. When the color filter substrate 12 overlaps the array substrate 11, the ridges 121 overlap with the ridges 111 so that their longitudinal directions are orthogonal to each other, and the set of the ridges 111 and 121 is the spacer 3 of the liquid crystal panel 1. Function as. For example, when the size of the liquid crystal panel 1 is about 60 to 70 inches, the length of the ridge 111 and the ridge 121 functioning as the spacer 3 is longer than 50 μm and the length in the short direction. Is longer than 5 μm. The liquid crystal panel 1 is provided with a plurality of sets of the ridges 111 and the ridges 121 provided in this way. In addition, in order to stabilize the alignment of the liquid crystal substance, the longitudinal direction of the protrusions 111 and 121 is preferably the same as the direction in which the alignment film aligns the liquid crystal substance, but is different from the alignment direction. There may be.
　図５は、スペーサ３の構成を示す断面図である。図５には、図４中において凸条１１１及び凸条１２１の重なった部分を左右方向に切った断面が表され、対向するアレイ基板１１及びカラーフィルタ基板１２と、両基板間の空隙に封入された液晶物質４が示されている。 FIG. 5 is a cross-sectional view showing the configuration of the spacer 3. FIG. 5 shows a cross section in which the overlapping portions of the ridges 111 and the ridges 121 in FIG. 4 are cut in the left-right direction, and is enclosed in the array substrate 11 and the color filter substrate 12 facing each other and the gap between the substrates. A liquid crystal material 4 is shown.
　カラーフィルタ基板１２においては、対向面側のガラス基板１２４上にブラックマトリクス１２２、透明導電膜１２５、及び配向膜１２６が積層されている。透明導電膜１２５は、ブラックマトリクス１２２及びカラーフィルタ１２３を覆うようにガラス基板１２４の全面に亘って形成され、カラーフィルタ１２３を覆う部分即ち画素電極１１３に対向する部分においては、共通電極として機能する。また、透明導電膜１２５上の一部に凸条１２７形成されている。凸条１２７は、所謂フォトスペーサに用いられる専用のスペーサ用材料が用いられ、フォトリソグラフィによって形成されている。配向膜１２６は、透明導電膜１２５及び凸条１２７を覆うようにガラス基板１２４の全面に亘って形成されている。上述の凸条１２１は、凸条１２７及び該凸条１２７を覆う一部の配向膜１２６によって構成されている。 In the color filter substrate 12, a black matrix 122, a transparent conductive film 125, and an alignment film 126 are laminated on a glass substrate 124 on the opposite surface side. The transparent conductive film 125 is formed over the entire surface of the glass substrate 124 so as to cover the black matrix 122 and the color filter 123, and functions as a common electrode in a portion covering the color filter 123, that is, a portion facing the pixel electrode 113. . Further, a protrusion 127 is formed on a part of the transparent conductive film 125. The protrusion 127 is made of a special spacer material used for a so-called photo spacer, and is formed by photolithography. The alignment film 126 is formed over the entire surface of the glass substrate 124 so as to cover the transparent conductive film 125 and the protrusions 127. The above-described ridge 121 is constituted by the ridge 127 and a part of the alignment film 126 that covers the ridge 127.
　アレイ基板１１においては、対向面側のガラス基板１１５上に信号配線１１４、絶縁膜１１６、及び配向膜１１７が積層されている。信号配線１１４は、ＴＦＴ１１２のゲートに接続する場合は、ゲートドライバ２１に接続する金属膜であり、ＴＦＴ１１２のソースに接続する場合は、ソースドライバ２２に接続する金属膜である。絶縁膜１１６は、ＴＦＴ１１２のソース、ドレイン、及びゲートの各電極と、画素電極１１３とを覆うようにガラス基板１１５の全面に亘って形成されている。また、絶縁膜１１６上の一部に凸条１１８が形成されている。凸条１１８は、凸条１２７と同様に、専用のスペーサ用材料が用いられ、フォトリソグラフィによって形成されている。配向膜１１７は、絶縁膜１１６及び凸条１１８を覆うようにガラス基板１１５の全面に亘って形成されている。上述の凸条１１１は、凸条１１８及び該凸条１１８を覆う一部の配向膜１１７によって構成されている。 In the array substrate 11, the signal wiring 114, the insulating film 116, and the alignment film 117 are laminated on the glass substrate 115 on the opposite surface side. The signal wiring 114 is a metal film connected to the gate driver 21 when connected to the gate of the TFT 112, and is a metal film connected to the source driver 22 when connected to the source of the TFT 112. The insulating film 116 is formed over the entire surface of the glass substrate 115 so as to cover the source, drain, and gate electrodes of the TFT 112 and the pixel electrode 113. Further, a protrusion 118 is formed on a part of the insulating film 116. Similarly to the ridge 127, the ridge 118 is made of a dedicated spacer material and is formed by photolithography. The alignment film 117 is formed over the entire surface of the glass substrate 115 so as to cover the insulating film 116 and the protrusions 118. The above-mentioned ridge 111 is constituted by the ridge 118 and a part of the alignment film 117 that covers the ridge 118.
　凸条１１１及び凸条１２１は、所謂フォトスペーサに用いられる専用のスペーサ用材料を用い、フォトリソグラフィによって形成されている。また、凸条１１１の頂面の一部は、凸条１２１の頂面の一部に当接してある。 The ridges 111 and the ridges 121 are formed by photolithography using a dedicated spacer material used for so-called photo spacers. A part of the top surface of the ridge 111 is in contact with a part of the top surface of the ridge 121.
　以上の構成における液晶パネル１は、撓みに起因してアレイ基板１１及びカラーフィルタ基板１２の相対的位置関係が変化した場合であっても、凸条１１１及び凸条１２１の頂面を互いに擦るだけである。即ち、画素電極１１３及びカラーフィルタ１２３上に形成されている配向膜は、液晶パネル１に撓みによるスペーサ３の位置ずれが生じた場合であっても、擦られることがない。従って、液晶パネル１及び該液晶パネル１を備える液晶表示装置は、液晶パネル１に撓みが生じた場合であっても、スペーサ３に起因する表示不良を確実に防止することができる。 In the liquid crystal panel 1 having the above configuration, even when the relative positional relationship between the array substrate 11 and the color filter substrate 12 changes due to bending, the top surfaces of the ridges 111 and the ridges 121 are rubbed against each other. It is. In other words, the alignment film formed on the pixel electrode 113 and the color filter 123 is not rubbed even when the spacer 3 is displaced due to bending in the liquid crystal panel 1. Therefore, the liquid crystal panel 1 and the liquid crystal display device including the liquid crystal panel 1 can reliably prevent display defects caused by the spacers 3 even when the liquid crystal panel 1 is bent.
　（実施の形態２）
　実施の形態１においては、凸条１１１及び凸条１２１の一部である凸条１１８及び凸条１２７は、専用のスペーサ用材料を用いて形成されていることを説明した。実施の形態２においては、当該スペーサ用材料を用いずに凸条１１１及び凸条１２１を形成する例を説明する。なお、以下で説明する箇所を除くその他の構成及び作用は上述の実施の形態１と同様であるため、同様の構成に関する詳細な説明及びその作用効果の説明は簡潔のため省略する。 (Embodiment 2)
In Embodiment 1, the ridge 118 and the ridge 127 which are a part of the ridge 111 and the ridge 121 have been described as being formed using a dedicated spacer material. In Embodiment 2, an example in which the ridges 111 and the ridges 121 are formed without using the spacer material will be described. Since other configurations and operations except for the portions described below are the same as those in the first embodiment, detailed description on the same configuration and description of the operation and effects are omitted for the sake of brevity.
　図６は、実施の形態２におけるスペーサ３の構成を示す断面図である。カラーフィルタ基板１２においては、ブラックマトリクス１２２上の一部に第１着色層１２８及び第２着色層１２９が積層されて、凸条をなしている。透明導電膜１２５は、ブラックマトリクス１２２及び当該凸条を覆うようにガラス基板１２４の全面に亘って形成されている。配向膜１２６は、透明導電膜１２５を覆うようにガラス基板１２４の全面に亘って形成されている。凸条１２１は、第１着色層１２８及び第２着色層１２９からなる凸条、該凸条を覆う一部の透明導電膜１２５、並びに当該一部の透明導電膜１２５を覆う一部の配向膜１２６で構成されている。ここで、第１着色層１２８及び第２着色層１２９は、夫々の色を表すカラーフィルタ１２３を形成するときに同時に形成される。 FIG. 6 is a cross-sectional view showing the configuration of the spacer 3 in the second embodiment. In the color filter substrate 12, a first colored layer 128 and a second colored layer 129 are laminated on a part of the black matrix 122 to form a ridge. The transparent conductive film 125 is formed over the entire surface of the glass substrate 124 so as to cover the black matrix 122 and the protrusions. The alignment film 126 is formed over the entire surface of the glass substrate 124 so as to cover the transparent conductive film 125. The ridge 121 includes a ridge formed of the first colored layer 128 and the second colored layer 129, a part of the transparent conductive film 125 covering the ridge, and a part of the alignment film covering the part of the transparent conductive film 125. 126. Here, the first colored layer 128 and the second colored layer 129 are formed at the same time when the color filter 123 representing each color is formed.
　アレイ基板１１においては、絶縁膜１１６の一部が突出し、凸条をなしている。配向膜１１７は、凸条部を含む絶縁膜１１６を覆うように、ガラス基板１１５の全面に亘って形成されている。凸条１１１は、絶縁膜１１６の凸条部及び該凸条部を覆う一部の配向膜１１７で構成されている。ここで、絶縁膜１１６の形成過程の内、絶縁膜１１６を構成する材料を露光する工程において、グレートーンマスク又はハーフトーンマスク等の多階調マスクが使用されることにより、凸条部を有する絶縁膜１１６が形成される。 In the array substrate 11, a part of the insulating film 116 protrudes to form a ridge. The alignment film 117 is formed over the entire surface of the glass substrate 115 so as to cover the insulating film 116 including the protrusions. The ridge 111 is composed of a ridge portion of the insulating film 116 and a part of the alignment film 117 covering the ridge portion. Here, in the process of exposing the material forming the insulating film 116 in the process of forming the insulating film 116, a multi-tone mask such as a gray-tone mask or a half-tone mask is used, so that the projection has a protruding portion. An insulating film 116 is formed.
　以上の構成における液晶パネル１の凸条１１１及び凸条１２１の一部は夫々、専用のスペーサ用材料を用いず、カラーフィルタ１２３、透明導電膜１２５、又は絶縁膜１１６を形成する工程のときに形成することができる。従って、別途スペーサ３を形成する工程を設ける必要がないため、効率よくスペーサ３を形成することができる。 Part of the ridges 111 and the ridges 121 of the liquid crystal panel 1 having the above-described configuration is a process of forming the color filter 123, the transparent conductive film 125, or the insulating film 116 without using a dedicated spacer material. Can be formed. Accordingly, it is not necessary to provide a separate step for forming the spacer 3, and the spacer 3 can be formed efficiently.
　なお、実施の形態２においては、凸条１１１及び凸条１２１ともに専用のスペーサ用材料を用いていないことを説明したが、何れか一方の凸条を専用のスペーサ用材料を用いて形成してもよい。また、実施の形態２においては、凸条１２１は、２種類の着色層が含まれて構成されていることを説明したが、含まれる着色層は、１種類であっても、３種類以上であってもよい。 In the second embodiment, it has been explained that neither the ridge 111 nor the ridge 121 uses a dedicated spacer material, but either one of the ridges is formed using a dedicated spacer material. Also good. Moreover, in Embodiment 2, although the protruding item | line 121 demonstrated that 2 types of colored layers were included, even if the included colored layer is 1 type, it is 3 or more types. There may be.
　（実施の形態３）
　実施の形態１及び２においては、一の凸条１１１及び一の凸条１２１が重なることによりスペーサとして機能していることを説明した。実施の形態３においては、何れか一方の凸条に他方の凸条が複数重なることでスペーサとして機能している例を説明する。なお、以下で説明する箇所を除くその他の構成及び作用は上述の実施の形態１及び２と同様であるため、同様の構成に関する詳細な説明及びその作用効果の説明は簡潔のため省略する。 (Embodiment 3)
In the first and second embodiments, it has been described that one ridge 111 and one ridge 121 overlap each other to function as a spacer. In the third embodiment, an example will be described in which a plurality of other ridges overlap with any one ridge to function as a spacer. Since other configurations and operations except for the portions described below are the same as those in the first and second embodiments, a detailed description of the same configurations and a description of the functions and effects are omitted for the sake of brevity.
　図７は、実施の形態３におけるスペーサ３の配置を示すための液晶パネル１を略示する模式的平面図である。実施の形態３において、凸条１２１は、実施の形態１及び実施の形態２で説明した凸条１２１よりも上下方向に長く延び、複数の凸条１１１と重なるように設けられている。即ち、複数の凸条１１１は、凸条１２１の長手方向に並設されている。当該凸条１２１及び複数の凸条１１１の組は、液晶パネル１のスペーサ３として機能する。 FIG. 7 is a schematic plan view schematically showing the liquid crystal panel 1 for illustrating the arrangement of the spacers 3 in the third embodiment. In the third embodiment, the ridge 121 is provided so as to extend longer in the vertical direction than the ridge 121 described in the first and second embodiments and overlap the plurality of ridges 111. That is, the plurality of ridges 111 are juxtaposed in the longitudinal direction of the ridge 121. The set of the ridge 121 and the plurality of ridges 111 functions as the spacer 3 of the liquid crystal panel 1.
　以上の構成における液晶パネル１は、凸条１２１は、複数の凸条１１１が並設できるような長さを長手方向に有しているため、液晶パネル１の撓み等によって生じる両基板の相対的位置関係における当該長手方向への変化を抑制することができる。また、両基板の相対的位置関係が当該長手方向に大きく変化した場合であっても、各凸条の頂面夫々を擦るだけであるため、スペーサ３に起因する表示不良を確実に防止することができる。 In the liquid crystal panel 1 having the above configuration, the ridge 121 has a length in the longitudinal direction so that the plurality of ridges 111 can be arranged side by side. A change in the longitudinal direction in the positional relationship can be suppressed. In addition, even when the relative positional relationship between the two substrates is greatly changed in the longitudinal direction, only the top surface of each ridge is rubbed, so that display defects caused by the spacers 3 can be reliably prevented. Can do.
　なお、実施の形態３においては、凸条１２１の長手方向に複数の凸条１１１が並設されていることを示したが、逆の関係であってもよい。 In addition, in Embodiment 3, although it showed that the several protruding item | line 111 was arranged in parallel by the longitudinal direction of the protruding item | line 121, the reverse relationship may be sufficient.
　また、実施の形態１～３においては、凸条１１１は信号配線１１４と重なる位置に設けられ、凸条１２１はブラックマトリクス１２２と重なる位置に設けられたが、それ以外の場所に設けられていてもよい。 In Embodiments 1 to 3, the ridge 111 is provided at a position overlapping the signal wiring 114, and the ridge 121 is provided at a position overlapping the black matrix 122. However, the protrusions 121 are provided at other locations. Also good.
　また、実施の形態１～３においては、凸条１１１及び凸条１２１は各長手方向が直交するように設けられていることを説明したがそれ以外であってもよい。例えば液晶パネル１の撓む方向が限定的である場合、凸条１１１及び凸条１２１は、各長手方向が当該撓む方向と同じになるように重なって設けられていてもよい。 In the first to third embodiments, it has been described that the ridges 111 and the ridges 121 are provided so that their longitudinal directions are orthogonal to each other, but other embodiments may be used. For example, when the direction in which the liquid crystal panel 1 bends is limited, the ridges 111 and the ridges 121 may be provided so as to overlap each other in the longitudinal direction.
　また、実施の形態１～３においては、凸条１１１は配向膜１１７の一部を含み、凸条１２１は配向膜１２６の一部を含むことを示したが、含まずに各凸条を形成してもよい。即ち、配向膜１１７は、突出している部分を除く絶縁膜１１６に積層されてもよいし、配向膜１２６は、突出している部分を除く透明導電膜１２５に積層されてもよい。 In the first to third embodiments, it has been shown that the protrusion 111 includes a part of the alignment film 117 and the protrusion 121 includes a part of the alignment film 126, but each protrusion is formed without including it. May be. That is, the alignment film 117 may be stacked on the insulating film 116 except for the protruding portion, and the alignment film 126 may be stacked on the transparent conductive film 125 except for the protruding portion.
　更に、今回開示された実施の形態は全ての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上記した意味ではなく、請求の範囲によって示され、請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。 Furthermore, it should be considered that the embodiment disclosed this time is illustrative in all respects and not restrictive. The scope of the present invention is defined not by the above meaning but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.
　１　液晶パネル
　２　駆動部
　３　スペーサ
　４　液晶物質
　１１　アレイ基板
　１１１　凸条（凸部）
　１１２　ＴＦＴ
　１１３　画素電極
　１１４　信号配線
　１１６　絶縁膜
　１１７　配向膜
　１２　カラーフィルタ基板
　１２１　凸条（凸部）
　１２２　ブラックマトリクス
　１２３　カラーフィルタ
　１２６　配向膜 DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Drive part 3 Spacer 4 Liquid crystal substance 11 Array substrate 111 Projection (convex part)
112 TFT
113 Pixel electrode 114 Signal line 116 Insulating film 117 Alignment film 12 Color filter substrate 121 Projection (convex part)
122 Black matrix 123 Color filter 126 Alignment film

Claims (8)

  1. 　対向する基板間に形成されたスペーサで保持された空隙に液晶物質が封入されてある液晶パネルにおいて、
    　前記スペーサは、前記対向する基板の各対向面から突出する凸部を含み、
    　一方の凸部における頂面の少なくとも一部は、他方の凸部における頂面の少なくとも一部に当接してあること
    　を特徴とする液晶パネル。     In a liquid crystal panel in which a liquid crystal substance is sealed in a gap held by a spacer formed between opposing substrates,
    The spacer includes a protrusion protruding from each facing surface of the facing substrate,
    A liquid crystal panel, wherein at least a part of a top surface of one convex part is in contact with at least a part of a top surface of the other convex part.
  2. 　前記凸部夫々は、
    　設けられている基板夫々の面に沿う凸条をなし、
    　各長手方向が直交するように設けられていること
    　を特徴とする請求項１に記載の液晶パネル。     Each of the convex portions is
    Convex ridges along the surface of each provided substrate,
    The liquid crystal panel according to claim 1, wherein the liquid crystal panels are provided so that their longitudinal directions are orthogonal to each other.
  3. 　前記基板の一方に複数の凸部が設けられてあり、他方に設けられた凸部の長手方向に並設されていること
    　を特徴とする請求項２に記載の液晶パネル。     The liquid crystal panel according to claim 2, wherein a plurality of convex portions are provided on one side of the substrate, and are arranged side by side in the longitudinal direction of the convex portions provided on the other side.
  4. 　前記対向する一方の基板は、マトリクス状に配置された複数の表示素子と、該複数の表示素子の駆動に用いられる複数の信号配線とを備え、該複数の信号配線が各表示素子に重ならないように配してあるアレイ基板であり、
    　該アレイ基板に設けられた凸部は、前記信号配線と重なる位置に設けられ、
    　前記対向する他方の基板は、前記表示素子に対向するようにマトリクス状に形成された複数の着色層と、該着色層の間に形成された遮光層とを備えるカラーフィルタ基板であり、
    　該カラーフィルタ基板に設けられた凸部は、前記遮光層と重なる位置に設けられていること
    　を特徴とする請求項２又は３に記載の液晶パネル。     The one opposing substrate includes a plurality of display elements arranged in a matrix and a plurality of signal wirings used for driving the plurality of display elements, and the plurality of signal wirings do not overlap each display element. The array substrate is arranged as follows:
    The convex portion provided on the array substrate is provided at a position overlapping the signal wiring,
    The other opposing substrate is a color filter substrate comprising a plurality of colored layers formed in a matrix so as to face the display element, and a light shielding layer formed between the colored layers,
    The liquid crystal panel according to claim 2, wherein the convex portion provided on the color filter substrate is provided at a position overlapping the light shielding layer.
  5. 　前記アレイ基板は、前記複数の信号配線を覆ってある絶縁膜を備え、
    　前記アレイ基板に設けられた凸部は、前記絶縁膜を形成する材料を含んで構成されていること
    　を特徴とする請求項４に記載の液晶パネル。     The array substrate includes an insulating film covering the plurality of signal wirings,
    The liquid crystal panel according to claim 4, wherein the convex portion provided on the array substrate includes a material for forming the insulating film.
  6. 　前記カラーフィルタ基板に設けられた凸部は、前記着色層を形成する材料を含んで構成されていること
    　を特徴とする請求項４又は５に記載の液晶パネル。     6. The liquid crystal panel according to claim 4, wherein the convex portion provided on the color filter substrate includes a material forming the colored layer. 7.
  7. 　前記アレイ基板及びカラーフィルタ基板夫々は、設けられた凸部の長手方向と同じ方向に前記液晶物質が配向するように配向処理された配向膜を備えること
    　を特徴とする請求項４から６までの何れか一つに記載の液晶パネル。     Each of the array substrate and the color filter substrate includes an alignment film that is aligned so that the liquid crystal material is aligned in the same direction as the longitudinal direction of the provided protrusions. The liquid crystal panel according to any one of the above.
  8. 　請求項４から７までの何れか一つに記載の液晶パネルと、
    　前記アレイ基板が有する信号配線を介して前記表示素子を駆動する駆動部と
    　を備えることを特徴とする液晶表示装置。     A liquid crystal panel according to any one of claims 4 to 7,
    A liquid crystal display device comprising: a drive unit that drives the display element through a signal wiring included in the array substrate.
PCT/JP2014/078483 2013-10-29 2014-10-27 Liquid crystal panel and liquid crystal display device WO2015064533A1 (en)

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JPH04151122A (en) * 1990-10-15 1992-05-25 Ricoh Co Ltd Liquid crystal display unit
JPH05158067A (en) * 1991-12-03 1993-06-25 Stanley Electric Co Ltd Liquid crystal display device and its production
JPH09120072A (en) * 1995-08-21 1997-05-06 Toshiba Electron Eng Corp Liquid crystal display element
JPH11242230A (en) * 1998-02-26 1999-09-07 Hitachi Ltd Liquid crystal display element
JP2000171808A (en) * 1998-12-03 2000-06-23 Hitachi Ltd Liquid crystal display device
JP2002162632A (en) * 2000-11-24 2002-06-07 Stanley Electric Co Ltd Liquid crystal display device
JP2003066461A (en) * 2001-08-27 2003-03-05 Sharp Corp Liquid crystal display device
JP2006053418A (en) * 2004-08-13 2006-02-23 Fujitsu Display Technologies Corp Substrate for liquid crystal display and liquid crystal display provided with the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04151122A (en) * 1990-10-15 1992-05-25 Ricoh Co Ltd Liquid crystal display unit
JPH05158067A (en) * 1991-12-03 1993-06-25 Stanley Electric Co Ltd Liquid crystal display device and its production
JPH09120072A (en) * 1995-08-21 1997-05-06 Toshiba Electron Eng Corp Liquid crystal display element
JPH11242230A (en) * 1998-02-26 1999-09-07 Hitachi Ltd Liquid crystal display element
JP2000171808A (en) * 1998-12-03 2000-06-23 Hitachi Ltd Liquid crystal display device
JP2002162632A (en) * 2000-11-24 2002-06-07 Stanley Electric Co Ltd Liquid crystal display device
JP2003066461A (en) * 2001-08-27 2003-03-05 Sharp Corp Liquid crystal display device
JP2006053418A (en) * 2004-08-13 2006-02-23 Fujitsu Display Technologies Corp Substrate for liquid crystal display and liquid crystal display provided with the same

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